The near wake of the 6:1 prolate spheroid with a turbulent boundary layer is characterized by
a small recirculation region (\(\sim 0.1 D\) ). The recirculation region is surrounded by small-scale turbulence that emerges from the boundary layer and does not show strong vortex shedding [1]}, [2]}, [3]}, [4]}. As a result, the wake is much thinner and develops slower than the wake of a bluff body like the disk, which has a large recirculation region (\(\sim 2 D\) ) and vortex shedding from the body [5]}. These body-dependent features of the near wake were recently shown to affect the decay of the far wake in environments without density stratification [4]}. In the present stratified simulations we also find substantial differences in the decay of the disk and spheroid wake. Particularly, we find that the starting locations of the non-equilibrium (NEQ) and the following quasi-2D (Q2D) regions of wake deficit velocity depend on the wake generator.
